Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5109f6ffc89a9e781c69e20d026369ca8de9df8f566f96cf2f38e2b5acc7b495' 
  AND token = 'o0DnK/CsxTdxUP8Gzc4CjMi9NoAkYPbU21b6L/2oqxs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}